Each stilt is used in track and field (9)
I believe the answer is:
athletics
'track and field' is the definition.
(thesaurus)
'each stilt is used' is the wordplay.
'is used' is an anagram indicator.
'each'+'stilt'='eachstilt'
'eachstilt' with letters rearranged gives 'ATHLETICS'.
'in' is the link.
(Other definitions for athletics that I've seen before include "Lithe acts performed in physical sports" , "Lithe acts (anag)" , "on the track, perhaps" , "Olympic sports" , "Track and field sports" .)